SpringBoot+MyBatis-Plus查询人员信息

需求：前端到后端查询出一个sql显示，用springboot、mybatis-plus、mysql

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一.项目目录

二、实现效果

三、部分代码

POM文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.1.8.RELEASEversion>
        <relativePath/> 
    parent>
    <groupId>com.examplegroupId>
    <artifactId>springbootdemoartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>springbootdemoname>
    <description>Demo project for Spring Bootdescription>
    <properties>
        <java.version>1.8java.version>
    properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-jdbcartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-aopartifactId>
        dependency>
        <dependency>
            <groupId>com.baomidougroupId>
            <artifactId>mybatis-plus-boot-starterartifactId>
            <version>3.1.2version>
        dependency>

        <dependency>
            <groupId>org.mybatis.spring.bootgroupId>
            <artifactId>mybatis-spring-boot-starterartifactId>
            <version>2.2.0version>
        dependency>

        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>fastjsonartifactId>
            <version>1.2.58version>
        dependency>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <optional>trueoptional>
        dependency>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-tomcatartifactId>
            <scope>providedscope>
        dependency>
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.32version>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-thymeleafartifactId>
        dependency>

    dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
        plugins>
    build>

project>

Controller层

package com.example.springbootdemo.controller;

import com.example.springbootdemo.pojo.Person;
import com.example.springbootdemo.service.PersonService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.List;

@Controller
public class PersonController {


    @Autowired
    private PersonService personService;
    
    /**
     * 查询所有人员信息
     * @param model
     * @return
     */
    @GetMapping("/queryAll")
    public String queryAll(ModelMap model){
        List<Person> persons =personService.queryAll();
        model.addAttribute("persons",persons);
        return "person.html";
    }
}

Service层

package com.example.springbootdemo.service;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.example.springbootdemo.mapper.PersonMapper;
import com.example.springbootdemo.pojo.Person;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class PersonServiceImpl implements PersonService{

    @Autowired
    private PersonMapper personMapper;


    /**
     * 查询所有人员
     * @return
     */
    @Override
    public List<Person> queryAll() {
        QueryWrapper<Person> queryWrapper=new QueryWrapper<>();
        List<Person> persons = personMapper.selectList(queryWrapper);
        return persons;
    }
}

Mapper层

package com.example.springbootdemo.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.springbootdemo.pojo.Person;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface PersonMapper extends BaseMapper {
}

MySQL数据库文件

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for person
-- ----------------------------
DROP TABLE IF EXISTS `person`;
CREATE TABLE `person`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  `age` int(11) NULL DEFAULT NULL,
  `address` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of person
-- ----------------------------
INSERT INTO `person` VALUES (1, '王昭君', 1, '杭州');
INSERT INTO `person` VALUES (2, '白起', 2, '上海');

SET FOREIGN_KEY_CHECKS = 1;

四.完整代码

Gitee:https://gitee.com/yangxumin/springbootdemo